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Get exit code of a background process
...ise, while solution02 is a little complicated.
solution01
#!/bin/bash
# start 3 child processes concurrently, and store each pid into array PIDS[].
process=(a.sh b.sh c.sh)
for app in ${process[@]}; do
./${app} &
PIDS+=($!)
done
# wait for all processes to finish, and store each process'...
converting a .net Func to a .net Expression
...xpanded at compile time, and if you want to support eval you would need to start up the compiler, but other than that, there's no problem at all doing that.
– configurator
May 30 '11 at 12:02
...
Efficient string concatenation in C++
...rack of the string length.
Keep a pointer to the end of the string and the start, or just the start and use the start + the length as an offset to find the end of the string.
Make sure the buffer you are storing your string in, is big enough so you don't need to re-allocate data
Use strcpy instead ...
What is the correct syntax for 'else if'?
...
Simple answer to a simple question. I had the same problem, when I first started (in the last couple of weeks).
So your code should read:
def function(a):
if a == '1':
print('1a')
elif a == '2':
print('2a')
else:
print('3a')
function(input('input:'))
...
Can I query MongoDB ObjectId by date?
...ction in your ~/.mongorc.js file to have it available when the mongo shell starts up.
– Stennie
Nov 27 '12 at 23:14
1
...
What is the purpose of wrapping whole Javascript files in anonymous functions like “(function(){ … }
...ification).
Earlier I described how these functions run automatically at startup, but if they run automatically who is passing in the arguments? This technique assumes that all the parameters you need are already defined as global variables. So if jQuery wasn't already defined as a global variabl...
How is Docker different from a virtual machine?
... think it is possible.
A full virtualized system usually takes minutes to start, whereas Docker/LXC/runC containers take seconds, and often even less than a second.
There are pros and cons for each type of virtualized system. If you want full isolation with guaranteed resources, a full VM is the w...
Favorite Visual Studio keyboard shortcuts [closed]
...ile cycling through document windows (Ctrl+Tab), however, pops up Windows' start menu. That just drives me nuts.
– sbi
Jun 2 '10 at 10:50
...
No mapping found for field in order to sort on in ElasticSearch
... always worked until today without updating any libraries etc. but today I started getting this same error. I now added "ignore_unmapped" : true and it started to work again but strange thing is, what has happened behind the scene! Who knows! Anyway, it works now. +1
– BentCode...
Unable to create/open lock file: /data/mongod.lock errno:13 Permission denied
...ot understand. I attached a volume on ec2 formatted the drive as root and start as root and yet as root I cant access? I am running on ubuntu 12.04. No other mongo is running
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